import statistics

data = [1.73, 1.58, 1.78, 1.80, 1.77]
data2 = [0.54, 0.56, 0.53, 0.51, 0.49]
stdev = statistics.stdev(data)
print(stdev)
print("=====")
print(statistics.pstdev(data))
print("=====")
print(statistics.pstdev(data2))
